A woman who once worked for the Chicago White Sox has filed a sexual discrimination lawsuit against the team and Major League Baseball alleging she was passed over for promotions because of her gender.

Deborah Theobald, 33, alleges in the lawsuit that in spite of stellar performance throughout her eight-year career with White Sox, she was routinely passed over for "upper management positions."

In 2004, when Theobald applied for the job of manager of partnerships, the White Sox opted to promote a "less qualified male," according to the complaint, which was filed in Cook County Circuit Court.

The lawsuit alleges she also was passed over in favor of less qualified men when she sought the job of senior manager of premium seating in 2008 and again in 2010.

"Plaintiff, a female, reported to a male supervisor, manager or director, who reported to a male supervisor or vice president, who, in turn, reported to a male executive vice president or Jerry Reinsdorf, male, and chairman of the White Sox," the lawsuit states.

Referencing "the glass ceiling and intentional sexual discriminatory policies and practices" of both the White Sox and MLB, the lawsuit alleges that women are denied equal opportunity to "advancement or promotion to upper management and officer positions."

Theobald quit her job with the White Sox in June 2010.

She is represented in the lawsuit by her father, Edward Theobald, who declined to comment Thursday. The White Sox also declined to comment, citing the team's policy against talking about active litigation.